RESUMEN
The effects of two gallium (Ga) compounds, Ga chloride (GaCl3) and tris(8-quinolinolato)Ga (III) on the viability of A549 human malignant lung adenocarcinoma cells were investigated. The results demonstrated that both drugs reduced the viability of A549 cells but to different extents. The inhibitory effects of tris(8-quinolinolato)Ga (III) were 10 times more profound than those produced by GaCl3. The IC50 was obtained with 2.5 microM of tris(8-quinolinolato)Ga (III) and 25 microM GaCl3 after an exposure time of 48 hours. Further, whereas the inhibitory effects of GaCl3 were both dose and time-dependent those of tris(8-quinolinolato)Ga (III) appeared to be only dose-dependent, indicating differences in their mechanism of action. Comparison with data drawn from the literature suggests that GaCl3 seems to be in the same range of activity as Ga nitrate or Ga-pyridoxal isocotinoyl hydrazone. Tris(8-quinolinolato)Ga (III) could be as effective as transferrin-Ga, but with the advantage of oral administration and a greater bioavailability of the tris(8-quinolinolato)Ga (III) compound.
Asunto(s)
Antineoplásicos/toxicidad , División Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Galio/toxicidad , Compuestos Organometálicos/toxicidad , Oxiquinolina/análogos & derivados , Adenocarcinoma , Humanos , Cinética , Neoplasias Pulmonares , Oxiquinolina/toxicidad , Células Tumorales CultivadasRESUMEN
Venous contention with elastic bandages is widely used in the treatment of Venous Insufficiency. We have attempted to number the clinical improvement by measuring TcPO2. Our study includes 16 cases; divided as follows: 6 healthy subjects (reference), 5 patients with severe varicose veins of the lower extremities, without ulcer, and 5 patients with varicose veins with ulcer of the leg. Measurements were carried out before and after 10 hours of venous contention. For each patient we have used a light bandage (x) with stretching to 30 and 50% of its length, and a heavy bandage (x) with stretching of 20 and 40%. Our results show, after contention, a decreased TcPO2 in the reference group, but an improvement of this TcPO2 in patients with varicose veins, with or without ulcer. This improvement is more marked with the use of light bandages.